Bosch R911274804, Project Planning Manual

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MKE
1-4
Introduction to MKE digital AC motors DOK-MOTOR*-MKE*******-PRJ1-EN-E1,44
•
06.97
Feedback electronics are equipped with data memory in which motor type
designations, control loops and motor parameters are stored.
The digital intelligent drive controllers from INDRAMAT can read this data
thus guaranteeing
•
an easy and quick startup
•
an automatic adjustment between motor and drive controllers, avoi-
ding any damage to the motor.
MKE motors are available with two position evaluation options, viz.,
•
relative position evaluation and
•
absolute position evaluation.
Designation Resolver feedback
(RSF)
Resolver feedback
(RSF) with integrated
multiturn absolute
encoder
measuring principle inductive
position resolution
at the motor
MKE035, 045: 3 x 2
13
= 24 576
MKE096: 4 x 2
13
= 32 768
information/rotations
system accuracy ±8 angle minutes
position detection
type
relative absolute (within 4096
motor rotations)
Fig. 1-3: Technical data - motor feedback
For relative indirect position evaluation. Replaces a separate incremental
encoder on the motor.
Features of the digital resolver feedback: Given a power failure or after
the initial POWER ON, it is necessary to first run the axis to its reference
point before work can begin.
⇒
When placing the reference point switches and during the referencing
procedure itself, it must be taken into account that during the course of
a mechanical motor revolution, several zero pulses are generated.
This is the result of the operating principle of the resolver. Therefore
note:
•
there are 3 zero pulses per revolution with the MKE 035 and MKE 045
•
there are 4 zero pulses per revolution with the MKE 096
⇒
For this reason, avoid transmission ratios that are too large or feed
constants that are too small.
For absolute indirect position detection within a range of 4096 motor revo-
lutions. Replaces a separate absolute encoder on the motor.
The absolute axis position of this feedback variant is retained even after
power has been shutdown because of the battery backup it is equipped
with. The battery has a lifespan of approximately ten years.
Feedback data storage
Technical data of the motor feedback
Resolver feedback (RSF)
Resolver feedback (RSF) with
integrated multiturn absolute
encoder